Exhaust-muffler.



G. F. TURNER.

EXHAUST MUFFLER. APPLICATION FILED rss. 18. 1916.

Patented Jan. 23,1917.

INVENTOR 'earyafl' 721m BY WITNESSES A TTORNEYS enonen r." momma, or momarown, rmmsvnvmn.

muss-man.

To all whom it may concern:

Be it known that I, GEORGE F. Tmmlm,

a citizen of the United States, and a resi dent of Mahoningtown, in the county of Lawrence and State of Pennsylvania, have invented a new and Improved Exhaust- Mufli'er, of which the following is a full, clear, and exact description. 5 I

My invention is more particularly in tended for use as a muffler for the exhaust of an internal combustion engine.

An object of the invention is to provide a device of the class referred to that will effectively mufile the sound of the exhaust without appreciably creating back pressure. A further object of the invention is to provide a strong and simple construction.

The purpose of the invention is served by a construction involving an external shell having heads thereon provided respectively with an inlet and an outlet and hav-' ing a tube extending between'the heads axi ally of the shell and communicating with the inlet thereof, said tube having a series of lateral outlets to the interior of the shell along the length of said tube for the expansion of the exhaust fluid, the outlet of the shell being at a side of said central tube. In connection with the shell referred to and its interior tube, I provide a transverse plate between the central tube and the. wall of the shell at the side of the shell adjacent to which the outlet is positioned and located a short distance from the latter, the plate, by reason of its form and position, constituting a barrier designed to minimize the emission from the mufller of sounds caused by the escape of the exhaust fluid from the central tube in the rear of said plate.

The invention will be particularly explained in the specific description follow-V ilteference is to be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate corresponding parts in all the views. Y

- Figure 1 is a longitudinal vertical section of an exhaust muflier embodying my invention; Fig. 2 is an enlarged transverse section on the line 2-2, Fig. 1; Fig. 3 is a rear end view; Fig. 4 is a diagrammatic view of a slightly d1fi'erent form of the invention. In carryin out my invention in practice, an elongate shell 10, preferably cylinspew-flu m m Patented Jan.23, 1917. Applicationfledlblmilry 18,1916. serialumaoas.

drical, is provided witha head 11 at the inlet end and a head 12 at the outlet end,

said heads having recessed, annular beads 13 to recelve the opposite ends. of the vshell 10. Tie rods 14 extend longitudinally of the shell, tying the heads, 11, 12, together, said 4 tierods having nuts 15. The head 11 has an elongated neck 16 thereon to connect with the exhaust of the engine, said neck leading to the interior of the shell through the head 11, and communicating with a tube 17, which is disposed axially 1n the shell 10' and clamped therein between the heads, 11,12. The head ll has an annular flange 18 receiving the adjacent end of the tube 17 and the opposite head 12 may have a channeled an-' nular bead 19, similar to the beads 13. Thus, J the head 12 closes the adjacent end of the tube 17.

A multiplicity of lateral outlet openings areprovided in the tube 17, preferably by cutting and bending the material of said tube as at 20, whereby to form curved front walls so that the products of combustion escaping through said lateral openings may be given a forward direction toward the outlet end of the shell. y I

An outlet 21, preferably is carried by the head 12 for the escapeof in elbow form products of combustion, said outlet being.

located at one side of the center and therefore at one side of the tube 17 and communicating with the interior of the shell through an opening 22.

- In order to baffle the sounds incident to the escape of the exhaust fluids from the tube 17, I provide a crescent-shaped baflle plate 23 in the shell at that side of the tube 17 at which the outlet 21 is located. The bafile 23 is positioned in the shell 10 a suflicient distance from the outlet opening 22 for the escape of the products of combustion over the said baffle through the said outlet. The arrangement is such that sound waves in the rear of the baflle 23 will be interrupted by saidbaflle so the sound waves escaping through the outlet 21 will be minimized.

I have found in practice that increased eificiency is obtained in the running of the engine when employing the mufller as described, in substitution for mufflers of other makes and also find that the device is very effective in mufiiing sound.

In Fig. 4 the outer shell 10-is provided with a tube 17 corresponding with the tube 17 but having an integral inlet extension 16% Said tube flares in the opposite directionfrom the tube 17 in Fig. 1. The outlet 21, corresponding with the outlet 21, has provided at the opposite end from the inlet 16, a baflie plate 23* which is formed and arranged as the baflle 23. I

In both forms of the invention, the longi tudinal tube'forms an extension chamber for the gases whereby it will lose its pressure or density in passing from the exhaust pipe to and through the muffler. The gases again gradually lose their density by escaping through .the successive rows of perforations to the main shell, so that practically the pressure is lowered'to a degree to prevent a noise in the escape of the gases to the atmosphere.

Having thus described my invention 1' claim as new and desire to secure by Letters Patent An exhaust muflier includlng an elongated shell having a head at each end', the one head having an extension at the center form- ,ing an inlet adapted to connect with the exhaust of an engine and the other head having an outlet at one side of the center, a tube concentric with the shell and extending from' side from which the outlet leads and posi-e tioned a short distance from the said outlet, there being a free space in the shell at the opposite side of the tube from the baffle and extending both in front and behind the saidname to this specification in the presence of two subscribing witnesses.

GEORGE W. MUSE,

ROGER H, UPDEGRAFF.

In testimony whereof -I have signed my 

